Muvtons medium duty Polyurethane treaded wheels 93° ±3° Shore Afor medium and light applications offer a cost -effective yet a good solution. Polyurethane tread is firmly bonded to precision machined cast iron cores offer smooth & noiseless running, are non-marking and floor protective. Tested & Guaranteed against bond failures. Wheel Bearing Options : Sealed precision ball bearings, tapered roller bearings or roller bearings. Colour: Light Brown. Temperature range: -20° C to +85° C.